//------------------------------------------------------------------
//  ParameterModifier.java    Author:20172330
//  Demonstratrs the effects of changing parameter values.
//------------------------------------------------------------------
public class ParameterModifier
  {
    //--------------------------------------------
    // Sets up three variables (one primitive and two objects) to
    // serve as actual parameters to the changeValues method.Prints
    // their values before and after calling the method.
    //--------------------------------------------
    public static void main(String []args)
    {
     ParameterTester modifier = new ParameterTester();
     
     int a1 = 111;
     Num a2 = new Num(222);
     Num a3 = new Num(333);

     System.out.println("Before calling changeValues:");
     System.out.println("a1\ta2\ta3");
     System.out.println(a1 +"\t" + a2 + "\t" +a3 + "\n");
     
     modifier.changeValues(a1 , a2, a3);
     System.out.println("After calling changeValues:");
     System.out.println("a1\ta2\ta3");
     System.out.println(a1 +"\t" +a2 +"\t" + a3 + "\n");
   } 
}

